Catch-pulley.



PATENTED JULY 14, 1903.

P. wuEs CATCH PULLEY.

APPLICATION FILED MAR. 30, 1903.

N0 MODEL.

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UNITED STATES iatented 14,

PATENT OFFICE.

CATCH-PULLEY.

SPECIFICATION forming part of Letters Patent Nd; 733,527, aata July 14,1903;

Application filed March 30, 1903.

T0 (LZZ whom it nuty concern:

Be it known that I, FREDERICK WUEsT, a citizen of the United States, residing at Lawrenceburg, in the county of Dearborn and State of Indiana, have invented certain new and useful Improvements in Catch-Pulleys; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in catch-pulleys. V

The object of the invention is to provide a pulley of this character which will give a perfect and reliable grip without injury to the cord or loss of space and which can be used at any angle without dislodgment or entangling the cord.

Another object is to provide such a pulley which will shorten the drop of the cord, give perfect alinement to the same, and which may be easily threaded when in place.

A further object is to provide such a pulley that will be simple in construction, strong, inexpensive, and well adapted to the use for which it is designed.

With these and other objects in view the invention consists in certain novel features of construction, combination, and arrangement of parts, as will be hereinafter more fully described, and particularly pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a front elevation of the pulley. Fig. 2 is a side view of the same. Fig. 3 is a bottom plan view. Fig. 4: is a rear elevation. Fig. 5 is a central vertical section on the line 5 5 of Fig. 1, and Fig. 6 is a central vertical section on the line 6 6 of Fig. 2.

In the drawings, 1 denotes the supporting bracket or casing, consisting of the base or top wall 2, having laterally-projecting ears or lugs 3 formed thereon and perforated for the reception of attaching-screws.

4 denotes the sides of the bracket or casing, and 5 denotes the partial front wall of the same.

Between the side walls 4 of the casing is ar ranged a pulley 6, journaled upon a shaft or pintle 7, mounted in the walls 4. The pulley Serial No. 150,224. (No model;)

6 is provided with a central annular groove 8 and an annular series of spirally-disposed short grooves 9,formed on the face or periphery of the pulley at each side of the central groove 8, the inner ends of the grooves 9 merging into the central groove at alternate points around the same, and the outer ends of the grooves 9 extend to and merge into the periphery or face of the pulley.

The inner portion 10 of the casing 1, formed by the top and partial front walls, is segmental in form, conforming to the shape of the periphery of the pulley 6, which is adapted to rotate in close proximity to the same.

In the innersegmental portion 10 of the casing is formed a centrally-disposed groove 12, which is coincident to and forming, with the central groove 8 in the pulley, a channel or passage through which a cord may freely pass when drawn upon in the same vertical plane. As soon, however, as the cord is swerved to any degree to the right or left of this plane the same will run into one of said spirallydlsposed grooves alternately arranged at the sides of the central groove, and upon releasing the pull upon the same the weight of the curtain or other object being drawn up will cause a retrograde movement of the pulley, which will bind the cord between the spiral groove into which it has run and the segmental-shaped wall of the casing and hold the same against further retrograde movement until released again by a forward or straight pull upon the cord, which will bring the same into a line with the central groove in the pulley and casing.

The particular object and advantage de rived from a catch-pulley constructed as herein described, having a casing with a segmental-shaped interior wall which is contiguous to the periphery of the pulley-wheel, is that after the curtain or other object has been drawn up to the proper height or slightly above that height and the cord run into one of the spirally-disposed side grooves and released the cord will almost instantly bind between the said groove and the segmental Wall, thereby permitting but a very slight, if any, drop or retrograde movement of the object drawn up, no matter when the pull upon the cord is stopped or at what angle the cord is pulled. The alternate arrangement of the spiral side grooves permits the cord to catch and bind at any point on one or the other sides of the central groove. This feature is of great advantage in some casesfor instance, when used in connection with adjustable drop-shade hangers, which when the shade has been drawn entirely to the top of a window and it is desired to fasten the same at this point a catch-pulley of ordinary construction would in a great many instances allow the shade to drop down so far before the cord is caught as to permit light to enter above the same, this being due to the fact that the inner wall of the casing of catch-pulleys of ordinary construction does not conform to the shape of and lie contiguous to the periphery of the pulley-wheel, and therefore the cord has to slip back or drop until it eugages a portion of the wall of the casing near enough to the periphery of the pulley-wheel to bind the same, whereas in the present instance the cord will bind almost instantly upon release of the same.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-'- A catch-pulley comprising a bracket having side walls and a segmentally-curved inner Wall, and a grooved pulley journaled upon said side walls, the said curved wall of the bracket extending concentrically with the periphery of the pulley, terminating at its rear above the axis of the pulley and having a short front wall forming a downward continuation of the said curved inner wall, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

, FREDERICK \VUEST.

XVitnesses:

HUGO WILLIAM FEDERLE, GEORGE E. VoN ZANG. 

